After winning wars Rome overcome as a superpower in the whole world. And in then in 30 BC Empire became the imperial.

Nearly 500 years run as the world’s super power, The Western Roman Empire crumbled in late fourth century. But in by fourth centaury Romans began to experience great difficulties to manage their far-flung empire. There are several reasons of collapsing the empire. Natural disaster, military failure and even a climate change perform very big role in collapse of Western Roman Empire. But according to historian The Roman Empire didn’t completely collapse in 476 AD, the Eastern part continued for another thousand years. At this time the Eastern Empire is known as the Byzantine Empire for those thousand years. While just how—and when—the Empire fell remains a subject of ongoing debate, certain theories have emerged as the most popular explanations for Western Rome’s decline and disintegration.

Edicts or laws issued from Rome could take months to reach outlying locations. The Control and communication system, which had always been tenuous, eventually began to disintegrate. Tribes from Northern Europe, such as the Goths, the Visigoths, the Vandals and the Franks, had conducted forays against the borders of Empire for years, and such attacks only increased. Even Italy fell prey to attacks by the “barbarians.”

Fall of Constantinople

Early in the fourth century, Emperor Constantine (280-337 AD) decided that Rome itself was not safe, and he moved the capitol to the ancient city of Byzantium (now Istanbul), which he renamed Constantinople. When Constantinople died in 337 AD his sons divided and then quarrelled over the Empire. The net result was a division of the Empire into an Eastern Roman Empire, based in Constantinople, and Western Roman Empire, based in Rome.

As the Western Roman Empire began to crumble under its own weight, the Northern Europeans gradually began to conquer pieces of it until they controlled large portions of Italy. At that time The Visigoths were branches of the nomadic tribes of Germanic peoples referred to collectively as the Goths. Alaric (370-410 AD) was the first king of the Visigoths. Alaric invaded and sacked Rome in 410 AD, and Attila the Hun (406?-453 AD) attacked the Roman provinces in the north around 433 AD. When the last Roman emperor, Romulus Augustulus (416-476 AD), was elected in 475 AD, he presided over a tiny shadow of the once invincible Roman Empire. When he was taken prisoner at Ravenna in 476 AD by the German King Odovacar (434?-493 AD), the Sun finally set out the empire that had been decreed by Caesar Augustus 505 years before.